A soffit is the underside surface of a roof overhang, typically located beneath the eaves. It bridges the gap between the exterior wall and the roof edge, serving both functional and protective roles in roofing systems.
One of the primary functions of soffits is ventilation. Perforated soffit panels allow fresh air to enter the attic space, creating airflow that helps regulate temperature and moisture levels. This ventilation system works in conjunction with ridge vents to prevent condensation, mold growth, and heat buildup.
Soffits also protect the underside of roof structures from weather exposure, pests, and debris. By enclosing open rafter spaces, they help maintain the structural integrity of the roof edge.
Materials used for soffits include vinyl, aluminum, wood, and composite panels. Each material offers different benefits in terms of durability, maintenance, and ventilation performance.
Proper soffit installation is essential for balanced attic airflow. Blocked or damaged soffits can lead to poor ventilation, increasing the risk of ice dams in winter and overheating in summer.
